I see that as hugely complicated, at lot would depend on their age, if the are still young, why not wait until later in their life to do this. It could be willed to you should anything happen to them with the understanding you would pass it along when he comes of age.
In the meantime, Son is an infant, will be approx 20 years before he has any control over the use of this property. Renting, property tax etc.. What if it needs to be sold within this time frame, due to new legislation, other unforeseen circumstances within the next 20 years etc.